Beam divergance would kill you. THe beam will grow in size as it
travels. If it grows, the engery is displaced over a bigger area,
and will need more time to 'cut' Our lasers do have 'adaptive
optics' a mirror that bends to control the beam's waist (and
autofucus) But to hold a beam's size for a few feet, itsn't
practicle.
A waterjet has a better chance, but that still a prob.
How about a hot knife/wire?
--- In Homebrew_PCBs@yahoogroups.com, Dave King <KingDWS@S...> wrote:
>
> I know this is really off topic for the group but have either one
of you
> tried to cut say
> through a few feet of styrofoam? Always been curious if a laser
would work
> in place
> of a hotwire saw.
>
> Dave